CSV ⇄ JSON Converter

Convert CSV to JSON and JSON back to CSV, both directions.

Input

Output

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Formula & methodology

How are CSV headers handled?

The first CSV row becomes the object keys; when going back to CSV, the union of all keys forms the header.

All processing happens locally in your browser. Your data is never uploaded.

Beautify, minify, and validate JSON with clear error messages.

Encode text to Base64 or decode Base64 back to text, with URL-safe support.